75399090 has 64 divisors (see below), whose sum is σ = 196874496. Its totient is φ = 18369792.

The previous prime is 75399067. The next prime is 75399113. The reversal of 75399090 is 9099357.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (75399067) and next prime (75399113).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 39232 + ... + 41108.

It is an arithmetic number, because the mean of its divisors is an integer number (3076164).

Almost surely, 2^75399090 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 75399090, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98437248).

75399090 is an abundant number, since it is smaller than the sum of its proper divisors (121475406).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

75399090 is a wasteful number, since it uses less digits than its factorization.

75399090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2003.

The product of its (nonzero) digits is 76545, while the sum is 42.

The square root of 75399090 is about 8683.2649389501. The cubic root of 75399090 is about 422.4630221013.

The spelling of 75399090 in words is "seventy-five million, three hundred ninety-nine thousand, ninety".